EP3972012A1 - Lithium-ionen-sekundärbatterie und herstellungsverfahren dafür - Google Patents

Lithium-ionen-sekundärbatterie und herstellungsverfahren dafür Download PDF

Info

Publication number
EP3972012A1
EP3972012A1 EP21195713.9A EP21195713A EP3972012A1 EP 3972012 A1 EP3972012 A1 EP 3972012A1 EP 21195713 A EP21195713 A EP 21195713A EP 3972012 A1 EP3972012 A1 EP 3972012A1
Authority
EP
European Patent Office
Prior art keywords
positive electrode
active material
negative electrode
electrode active
material layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21195713.9A
Other languages
English (en)
French (fr)
Other versions
EP3972012B1 (de
Inventor
Kei Shimamoto
Takao Fukunaga
Hideyuki Sugiyama
Wataru Masuda
Hiroki Fujita
Munetaka HIGUCHI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Publication of EP3972012A1 publication Critical patent/EP3972012A1/de
Application granted granted Critical
Publication of EP3972012B1 publication Critical patent/EP3972012B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0567—Liquid materials characterised by the additives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/446—Initial charging measures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0438—Processes of manufacture in general by electrochemical processing
    • H01M4/044—Activating, forming or electrochemical attack of the supporting material
    • H01M4/0445—Forming after manufacture of the electrode, e.g. first charge, cycling
    • H01M4/0447—Forming after manufacture of the electrode, e.g. first charge, cycling of complete cells or cells stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • H01M2300/0028—Organic electrolyte characterised by the solvent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure relates to a lithium ion secondary battery and a production method thereof.
  • a lithium ion secondary battery mainly includes: a positive electrode and a negative electrode which absorb and release lithium; a nonaqueous electrolyte; and a separator, and is used, for example, in electronic devices such as mobile phones and personal computers, and electronic vehicles.
  • the nonaqueous electrolyte is obtained by dissolving a lithium salt in a nonaqueous solvent such as ethylene carbonate, propylene carbonate, and dimethyl carbonate.
  • a nonaqueous solvent such as ethylene carbonate, propylene carbonate, and dimethyl carbonate.
  • Japanese Unexamined Patent Publication No. 2000-243447 discloses using, as a nonaqueous solvent of the lithium ion secondary battery, a solvent mixture of ethylene carbonate, propylene carbonate, and ⁇ -butyrolactone, each of which has a high boiling point.
  • ⁇ -butyrolactone is effective in increasing a flash point of the lithium ion secondary battery.
  • ⁇ -butyrolactone is degraded on the negative electrode and that the output of the battery decreases due to the degradation product. It is considered that the degradation product moves to the positive electrode, and Li ions are inhibited from entering and exiting to and from the positive electrode.
  • an object of the present invention is to achieve both an increase in the flash point of a lithium ion secondary battery and an improvement in durability of the lithium ion secondary battery, and in particular, to ensure outputs of the lithium ion secondary battery in cold circumstances for a long period of time.
  • ⁇ -butyrolactone is used as a nonaqueous solvent, and a coat is formed on each of positive and negative electrodes to reduce degradation of the ⁇ -butyrolactone on the negative electrode and deterioration of the positive electrode due to a degradation product of the ⁇ -butyrolactone.
  • a lithium ion secondary battery including: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode having a negative electrode active material layer on a surface of a negative electrode collector; a nonaqueous electrolyte, the positive electrode, the negative electrode, and the nonaqueous electrolyte being accommodated in a battery case, the nonaqueous electrolyte containing ⁇ -butyrolactone (hereinafter "GBL”) as a main component of a nonaqueous solvent; a coat (SEI layer) containing a component derived from vinylene carbonate (hereinafter "VC”), on the surface of the negative electrode active material layer; and a coat containing a component derived from monoalkyl sulfate ions, on a surface of the positive electrode active material layer.
  • GBL ⁇ -butyrolactone
  • the nonaqueous electrolyte contains GBL as a base.
  • the GBL is a high-dielectric constant solvent having a large intermolecular bonding force.
  • the GBL also has a low melting point and stays liquid even at low temperatures.
  • the nonaqueous electrolyte containing GBL is therefore advantageous in increasing the flash point of the lithium ion secondary battery and improving outputs of the lithium ion secondary battery in cold circumstances.
  • the VC-derived coat formed on the surface of the negative electrode active material layer prevents the reduction and degradation of the GBL on the negative electrode. Even if a degradation product of the GBL generated on the negative electrode moves to the positive electrode, the monoalkyl sulfate ion-derived coat formed on the surface of the positive electrode active material layer prevents deterioration of the positive electrode due to the degradation product. Oxidation and degradation of the GBL on the positive electrode are also prevented.
  • the presence of the VC-derived coat on the negative electrode active material layer and the monoalkyl sulfate ion-derived coat on the positive electrode active material layer makes it possible to substantially prevent the cycle deterioration of the lithium ion secondary battery including the nonaqueous electrolyte that contains GBL as a base.
  • the lithium ion secondary battery can ensure high output properties for a long period of time even when used under a sub-zero environment.
  • a coat containing components each derived from VC or from the monoalkyl sulfate ions is formed on the surface of the negative electrode active material layer. This is advantageous in substantially preventing reduction and degradation of GBL on the negative electrode.
  • a coat containing components each derived from the monoalkyl sulfate ions or from bis(oxalate)borate (hereinafter "BOB") ions is formed on the surface of the positive electrode active material layer. This is advantageous in prevention of oxidation and degradation of GBL on the positive electrode and degradation of the positive electrode due to the degradation product.
  • the positive electrode contains lithium iron phosphate having an olivine crystal structure as a positive electrode active material. This is advantageous in ensuring thermal stability in charging the lithium ion secondary battery, and can increase a discharge voltage. In this case, since the monoalkyl sulfate ion-derived coat protects the positive electrode active material layer from the degradation product of GBL, degradation of lithium iron phosphate (elution of Fe) is prevented.
  • the negative electrode contains a carbon material as a negative electrode active material. This is advantageous in increasing the battery capacity.
  • GBL is employed as a nonaqueous solvent with the use of a graphite-based carbon material as a negative electrode active material
  • a solid electrolyte interface (SEI) layer is less prone to be formed on the surface of the negative electrode, which is a problem.
  • the SEI layer is formed by reduction and degradation of the solvent in the electrolyte while charging, and solvated Li ions are de-solvated when passing through the SEI layer and are then inserted between graphite layers individually. If the formation of the SEI layer is insufficient, the solvated Li ions are inserted directly between the graphite layers (co-insertion), the degradation reaction of the solvent proceeds between the graphite layers, and the crystal structure of graphite is broken, thereby reducing the cycle stability performance of the battery.
  • the solvated Li ions are de-solvated efficiently through the VC- or monoalkyl sulfate ion-derived coat (SEI layer), and the degradation reaction of the solvent between the graphite layers is substantially reduced, thereby improving the cycle stability performance.
  • SEI layer monoalkyl sulfate ion-derived coat
  • the nonaqueous electrolyte contains, as the nonaqueous solvent, dibutyl carbonate (hereinafter "DBC") in addition to the GBL.
  • DBC dibutyl carbonate
  • GBL has a high viscosity, which causes poor wettability to the separator
  • the addition of DBC improves wettability of the nonaqueous electrolyte to the separator. This contributes to an increase in ion conductivity and is advantageous in improving output properties of the lithium ion secondary battery.
  • DBC has a high boiling point (about 206°C) and is thus preferred from the viewpoint of reducing volatilization of the nonaqueous solvent.
  • n-DBC having a high flash point (91°C) can be suitably employed.
  • the nonaqueous solvent may contain ethylene carbonate (hereinafter “EC") in addition to GBL and DBC, or may further contain EC and propylene carbonate (hereinafter “PC”).
  • EC ethylene carbonate
  • PC propylene carbonate
  • the addition of EC or PC that is a high boiling point, high-dielectric constant solvent advantageously increases the flash point of the lithium ion secondary battery and improves outputs of the lithium ion secondary battery in cold circumstances.
  • the concentration of the GBL in the nonaqueous solvent is set to be 50 vol% or more.
  • the concentration of the DBC is suitably 5 vol% or more to 15 vol% or less.
  • each concentration is suitably 5 vol% or more to 30 vol% or less.
  • both of EC and PC are added, the concentration of the EC and PC together is 10 vol% or more to 40 vol% or less.
  • a production method of a lithium ion secondary battery including: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode having a negative electrode active material layer on a surface of a negative electrode collector; and a nonaqueous electrolyte, the positive electrode, the negative electrode, and the nonaqueous electrolyte being accommodated in a battery case.
  • the method includes: accommodating the positive electrode and the negative electrode in the battery case and further encapsulating the nonaqueous electrolyte into the battery case and sealing the battery case, thereby obtaining a battery assembly, the nonaqueous electrolyte being obtained by dissolving a lithium salt in a nonaqueous solvent containing GBL as a main component and containing VC and lithium monoalkyl sulfate, and subjecting the battery assembly to an initial charge process, thereby forming a coat containing a component derived from the VC on the surface of the negative electrode active material layer and forming, on the surface of the positive electrode active material layer, a coat containing a component derived from lithium monoalkyl sulfate.
  • the above-described lithium ion secondary battery can be obtained by this production method.
  • This production method allows formation of the coat derived from the monoalkyl sulfate ions generated by ionization of the lithium monoalkyl sulfate on the surface of the positive electrode active material layer, and the coat derived from VC and monoalkyl sulfate ions on the surface of the negative electrode active material layer. Accordingly, the resistance to insertion and extraction of Li ions into and from the negative electrode active material decreases.
  • the nonaqueous electrolyte is obtained by dissolving a lithium salt in a nonaqueous solvent containing GBL as a main component and containing VC, lithium monoalkyl sulfate, and LiBOB.
  • the coat containing components each derived from BOB ions generated by ionization of the LiBOB or from the monoalkyl sulfate ions is formed on the surface of the positive electrode active material layer.
  • the lithium monoalkyl sulfate is expressed by a general formula (1): RO-SO 3 Li, where R is a linear or branched alkyl group with a carbon number of 1 to 4. That is, the lithium monoalkyl sulfate is preferably at least one kind selected from the group consisting of CH 3 OSO 3 Li, C 2 H 5 OSO 3 Li, CH 3 CH 2 CH 2 OSO 3 Li, CH 3 CH(CH 3 )OSO 3 Li, CH 3 CH 2 CH 2 CH 2 OSO 3 Li, CH 3 CH 2 CH(CH 3 )OSO 3 Li, (CH 3 ) 2 CHCH 2 OSO 3 Li, and C(CH 3 ) 3 OSO 3 Li, and more preferably C 2 H 5 OSO 3 Li.
  • R is a linear or branched alkyl group with a carbon number of 1 to 4. That is, the lithium monoalkyl sulfate is preferably at least one kind selected from the group consisting of CH 3 OSO 3 Li, C 2 H 5 OSO 3 Li, CH
  • the concentration of VC in the nonaqueous electrolyte is preferably 0.3 mass% or more from the viewpoint of forming a coat (SEI layer) capable of preventing reduction and degradation of GBL on the surface of the negative electrode active material layer.
  • the concentration of the VC is preferably 3 mass% or less because a VC-derived coat having a larger thickness causes greater resistance in insertion and desorption of Li ions to and from the negative electrode active material.
  • the concentration of the VC is more preferably 0.5 mass% or more to 2.5 mass% or less, and still more preferably 1 mass% or more to 2 mass% or less.
  • the concentration of lithium monoalkyl sulfate in the nonaqueous electrolyte is preferably 0.3 mass% or more from the viewpoint of forming, on the surface of the positive electrode active material layer, a coat suitable for protecting the positive electrode active material.
  • the concentration of this lithium monoalkyl sulfate is preferably 1.5 mass% or less because a monoalkyl sulfate ion-derived coat having a larger thickness causes greater resistance in insertion and desorption of Li ions to and from the positive electrode active material.
  • the concentration of the lithium monoalkyl sulfate is more preferably 0.5 mass% or more to 1 mass% or less.
  • the concentration of LiBOB in the nonaqueous electrolyte is preferably 0.3 mass% or more from the viewpoint of forming, on the surface of the positive electrode active material layer, a coat suitable for protecting the positive electrode active material.
  • the concentration of the LiBOB is preferably 1.5 mass% or less because a BOB ion-derived coat having a larger thickness causes greater resistance in insertion and desorption of Li ions to and from the positive electrode active material.
  • the concentration of the LiBOB is more preferably 0.5 mass% or more to 1 mass% or less.
  • a lithium ion secondary battery according to the present embodiment is suitable for use in an electronic device, an electric vehicle, a hybrid vehicle, and the like.
  • the lithium ion secondary battery 1 includes a wound body 2 in which a plurality of thin sheet-like battery components are wound together into a flat spiral shape (like a roll of fabric), an insulating sheet 3 covering the outer periphery of the wound body 2, and a battery case 4 accommodating these components of the battery.
  • a positive electrode terminal 5 and a negative electrode terminal 6 are provided on an upper surface of the battery case 4.
  • the wound body 2 includes two sheet-like separators 7, a sheet-like positive electrode 8 connected to the positive electrode terminal 5, and a sheet-like negative electrode 9 connected to the negative electrode terminal 6.
  • the wound body 2 is formed by winding, into a flat spiral shape, a stacked body obtained by stacking one of the separators 7, the negative electrode 9, the other separator 7, and the positive electrode 8 in this order.
  • Each of the separators 7 is impregnated with a nonaqueous electrolyte.
  • the nonaqueous electrolyte is obtained by dissolving a Li salt in a nonaqueous solvent containing GBL as a main component.
  • the upper surface of the battery case 4 has an inlet 21 for the nonaqueous electrolyte.
  • the inlet 21 is closed with a stopper 22.
  • the battery components may be a stacked body obtained by layering and folding sheet-like battery components in a zigzag shape, instead of a form of a wound body.
  • the battery components in the form of the stacked body can be arranged up to a corner of the space in the battery case, which increases the capacity of the battery.
  • the positive electrode 8 is formed by providing a positive electrode active material layer 12 on a surface of a positive electrode collector 11 (a surface opposite to the negative electrode 9).
  • the collector 11 is made of a metal thin film having electrical conductivity.
  • a preferred collector 11 can be an aluminum foil.
  • the positive electrode active material layer 12 is formed by mixing a positive electrode active material and assistants (a binder and a conductive assistant) and then applying the mixture to the collector 11.
  • a preferred positive electrode active material includes: a composite metal oxide of lithium and one or more kinds selected from the group consisting of cobalt, manganese, and nickel; a phosphoric acid-based lithium compound; and a silicic acid-based lithium compound.
  • a phosphoric acid-based lithium is suitably employed.
  • These positive electrode active materials may be used alone or in a combination of two or more of them.
  • PVdF polyvinylidene fluoride
  • conductive assistant any of carbon black, acetylene black, carbon nanofibers (CNFs), and the like can be employed.
  • a monoalkyl sulfate ion-derived coat 13 in contact with the nonaqueous electrolyte 17 is formed on a surface of the positive electrode active material layer 12.
  • the separators 7 are omitted in FIG. 2 .
  • the negative electrode 9 is formed by providing a negative electrode active material layer 15 on a surface of a negative electrode collector 14 (a surface opposite to the positive electrode 8).
  • the collector 14 is made of a metal thin film having electrical conductivity.
  • a preferred collector 14 includes a copper foil.
  • the negative electrode active material layer 15 is formed by mixing a negative electrode active material and assistants (a binder and a conductive assistant) and then applying the mixture to the collector 14.
  • a graphite-based carbon material such as artificial graphite or natural graphite can be suitably employed.
  • the graphite-based carbon material one having a low graphitization degree is preferred from the viewpoint of improving an ability of absorbing and releasing lithium ions.
  • Artificial graphite and hard carbon each of which has a low graphitization degree, are suitable as a negative electrode active material. Natural graphite alone has high crystallinity, thereby easily deteriorated. Thus, surface-treated natural graphite and artificial graphite are suitably used in combination.
  • SBR styrene-butadiene rubber
  • SBR-CMC styrene-butadiene rubber
  • carboxymethylcellulose as a thickener
  • PVdF styrene-butadiene rubber
  • an imide-based binder a polyacrylic acid-based binder, or the like
  • conductive assistant carbon black, acetylene black, carbon nanofibers (CNFs), or the like can be suitably employed.
  • a VC-derived coat (SEI layer) 16 in contact with the nonaqueous electrolyte 17 is formed on a surface of the negative electrode active material layer 15.
  • the separator 7 is a porous thin film made of a synthetic resin, such as polyethylene and polypropylene, and is impregnated with the nonaqueous electrolyte 17.
  • the nonaqueous electrolyte is obtained by dissolving a lithium salt (support electrolyte) in a nonaqueous solvent containing GBL as a main component.
  • the nonaqueous electrolyte is a liquid at -40°C to 70°C, and an additive is added thereto as required.
  • the nonaqueous solvent may be a solvent mixture that contains, in addition to GBL, one or more kinds selected from various organic solvents including cyclic carbonates such as EC and PC, cyclic esters such as ⁇ -valerolactone (GVL), chain carbonates such as DBC, ethers, sulfones, and the like.
  • cyclic carbonates such as EC and PC
  • cyclic esters such as ⁇ -valerolactone (GVL)
  • chain carbonates such as DBC
  • ethers ethers, sulfones, and the like.
  • DBC improves wettability of the nonaqueous electrolyte to the separators 7.
  • a wettability improving solvent can be, for example, methylbutyl carbonate (MBC) and ethylbutyl carbonate (EBC).
  • MBC methylbutyl carbonate
  • EBC ethylbutyl carbonate
  • n-DBC having a high flash point (91°C) is suitably employed.
  • the concentration of the wettability improving solvent in the nonaqueous solvent may be set to be 5 vol% or more to 15 vol% or less.
  • a preferred example of the solvent mixture is a solvent mixture of GBL, EC and/or PC, and DBC.
  • the following volume percentages of the respective substances are particularly suitable: the concentration of GBL is 50 vol% or more; if EC or PC is added alone, each concentration is 5 vol% or more to 30 vol% or less; if both of EC and PC are added, the concentration of the EC and PC together is 10 vol% or more to 40 vol% or less; and the concentration of DBC is 5 vol% or more to 15 vol% or less.
  • a preferred lithium salt includes LiPF 6 , LiBF 4 , LiPO 2 F 2 , LiN(SO 2 F) 2 , LiN(SO 2 CF 3 ) 2 , and LiN(SO 2 C 2 F 5 ) 2 .
  • the lithium salts may be used alone or in a combination of two or more of them.
  • the concentration of the lithium salt in the nonaqueous electrolyte may be, for example, 0.5M or more to 2.0M or less.
  • the nonaqueous electrolyte contains lithium monoalkyl sulfate for forming the monoalkyl sulfate ion-derived coat 13 on the surface of the positive electrode active material layer 12, and VC for forming the VC-derived coat (SEI layer) 16 on the surface of the negative electrode active material layer 15.
  • LiBOB may be added to the nonaqueous electrolyte in order to form the coat 13 derived from the monoalkyl sulfate ions and the BOB ions on the surface of the positive electrode active material layer 12.
  • the monoalkyl sulfate ions, the BOB ions, and the VC are consumed for forming the coats 13 and 16 by the initial charge process, but some of the monoalkyl sulfate ions, the BOB ions, and the VC remain in the nonaqueous electrolyte even after the process. In some cases, the monoalkyl sulfate ions, the BOB ions, or the VC do not remain in the nonaqueous electrolyte.
  • the negative electrode 9 has a defective SEI layer formed thereon, a reduction and degradation reaction of the GBL in the nonaqueous electrolyte occurs on the negative electrode 9 in charging of the lithium ion secondary battery 1.
  • the collector (copper) 14 of the negative electrode 9 is dissolved in the nonaqueous electrolyte 17, and a reduction and degradation reaction of the GBL occurs in the negative electrode 9.
  • Degradation products of the GBL when diffused in the nonaqueous electrolyte 17, inhibit regeneration of the normal SEI layer nearby, and cause clogging of the separator 7. As a result, the cycle characteristics of the battery 1 deteriorate due to the formation of the defect SEI layer and the inhibition of the movement of the Li ions passing through the separator 7. Further, when the degradation products of the GBL move to the positive electrode 8, the binder of the positive electrode active material layer 12 is degraded and the positive electrode active material is eluted, which deteriorates the trapping property of Li ions in the positive electrode 8.
  • the monoalkyl sulfate ion-derived coat 13 is formed on the surface of the positive electrode active material layer 12, and the VC-derived coat (SEI layer) 16 is formed on the surface of the negative electrode active material layer 15, as described above.
  • the monoalkyl sulfate ion-derived coat 13 is generated in initial charging, which will be described later, of the lithium ion secondary battery. Although the specific mechanism of the generation of the coat 13 is unknown, it is assumed that the monoalkyl sulfate ions in the nonaqueous electrolyte are oxidized, degraded, and polymerized, thereby generating the coat 13.
  • the term "monoalkyl sulfate ion-derived coat” 13 used herein expresses that the coat contains a component derived from monoalkyl sulfate ions, and the coat 13 may contain a degradation product produced by the initial charging of another solvent or a supporting electrolyte of the nonaqueous electrolyte which is not derived from the monoalkyl sulfate ions.
  • the coat 13 may contain a compound obtained by oxidizing, degrading, and polymerizing BOB ions.
  • the VC-derived coat 16 is generated in initial charging, which will be described later, of the lithium ion secondary battery. Although the specific mechanism of the generation of the coat 16 is unknown, it is assumed that the VC in the nonaqueous electrolyte is reduced, degraded, and polymerized, thereby generating the coat 16.
  • the term "VC-derived coat" 16 used herein expresses that the coat 16 contains a component derived from VC, and the coat 16 may contain a degradation product produced by the initial charging of another solvent or a supporting electrolyte of the nonaqueous electrolyte which is not derived from the VC.
  • the coat 16 may contain a compound obtained by oxidizing, degrading, and polymerizing monoalkyl sulfate ions.
  • the VC-derived coat 16 covering the surface of the negative electrode active material layer 15 prevents the reduction and degradation, on the negative electrode, of the GBL in the nonaqueous electrolyte. If the GBL is degraded on the negative electrode, the degradation products are diffused toward the positive electrode. However, the surface of the positive electrode active material layer 12 is covered with the monoalkyl sulfate ion-derived coat 13. The monoalkyl sulfate ion-derived coat 13 therefore prevents the battery output decrease caused by the broken binder of the positive electrode active material layer 12 caused by the degradation products of the GBL. In addition, the monoalkyl sulfate ion-derived coat 13 is advantageous in maintaining the cycle characteristics as not inhibiting the Li ions from being inserted into and desorbed from the crystal structure of the positive electrode active material.
  • the above lithium ion secondary battery can be produced by a method including the following steps.
  • a positive electrode active material and assistants (a binder and a conductive assistant) are kneaded to prepare a mixture in a slurry form.
  • the mixture is applied to a collector 11 and dried, thereby forming a sheet-like positive electrode 8 in which the positive electrode active material layer 12 is formed on a surface of the collector 11.
  • a negative electrode active material and assistants (a binder and a conductive assistant) are kneaded to prepare a mixture in a slurry form.
  • the mixture is applied to a collector 14 and dried, thereby forming a sheet-like negative electrode 9 in which the negative electrode active material layer 15 is formed on a surface of the collector 14.
  • the sheet-like positive and negative electrodes 8 and 9 are stacked on each other, with one of the separators 7 interposed between the positive and negative electrodes 8 and 9, thereby obtaining an electrode element.
  • Positive and negative leads are attached to the electrode element, and this electrode element is accommodated in a battery case 4.
  • a nonaqueous electrolyte which is obtained by dissolving a Li salt in a nonaqueous solvent containing GBL as a main component, is introduced into the battery case 4 from an inlet 21.
  • the inlet 21 is sealed with the stopper 22, thereby obtaining a battery assembly.
  • Lithium monoalkyl sulfate and VC are previously added to the nonaqueous electrolyte.
  • LiBOB is added to the nonaqueous solvent as necessary.
  • the battery assembly is subjected to an initial charge process, thereby forming coats 13 and 16.
  • the initial charge is performed such that the electric potential of the negative electrode 9 is equal to or below the reduction potential of VC.
  • a constant-current (CC) charge process or a constant-current constant-voltage (CCCV) charge process in which constant-current charge is followed by constant-voltage charge may be employed.
  • the initial charge process brings, on the surface of the positive electrode active material layer 12, the coat 13 derived from lithium monoalkyl sulfate ions generated by ionization of the lithium monoalkyl sulfate, and the coat 16 derived from VC on the surface of the negative electrode active material layer 15.
  • the coat 13 on the surface of the positive electrode active material layer 12 contains a compound derived from BOB ions generated by ionization of LiBOB.
  • the coat 16 on the surface of the negative electrode active material layer 15 contains a compound derived from monoalkyl sulfate ions and a compound derived from BOB ions.
  • the gas generated in association with the formation of the coats 13 and 16 by the initial charge process is removed from the battery case.
  • the lithium ion secondary battery After the initial charge process, the lithium ion secondary battery is full charged to its upper limit voltage. The initial discharge capacity is checked and then an aging process for checking the presence or absence of a battery failure is performed on the lithium ion secondary battery.
  • Lithium ion secondary batteries according to the respective samples having the compositions of the nonaqueous electrolyte shown in Table 1 were produced in accordance with the above-described production method.
  • "RO-SO 3 Li” is lithium monoalkyl sulfate.
  • Lithium ethyl sulfate C 2 H 5 OSO 3 Li was used in the property test.
  • LiFePO 4 (positive electrode active material) and carbon black (conductive assistant) were mixed, and a binder solution previously obtained by dissolving PVdF (binder) was then added to the mixture and mixed.
  • a positive electrode mixture in the form of paste was prepared.
  • This positive electrode mixture was applied to a surface of an aluminum foil (collector), then dried, and pressurized.
  • Hard carbon (negative electrode active material) and carbon black (conductive assistant) were mixed, and a binder solution previously obtained by dissolving SBR-CMC (binder) was then added to the mixture and mixed.
  • a negative electrode mixture in the form of paste was prepared. This negative electrode mixture was applied to a surface of a copper foil (collector), then dried, and pressurized.
  • a negative electrode was produced.
  • the samples were subjected to a cycle deterioration test (measurement of the maintenance rate of the CCA current before and after the cycle deterioration test).
  • Conditions for the cycle deterioration tests are as follows. That is, the battery temperature was 60°C; the battery capacity was 3 Ah; the depth of discharge (DOD) was 100%; and the charge and discharge conditions were 1C.
  • FIG. 3 shows the CCA currents before and after the cycle deterioration test.
  • FIG. 4 shows the maintenance rate of the CCA current.
  • This CCA current is the maximum current at 1.8 V from a constant current discharge from 100% of SOC at a battery temperature of -18°C.
  • Sample 6 (containing RO-SO 3 Li and LiBOB added) has a greater CCA current than Sample 5 (added with RO-SO 3 Li).
  • Sample 6 has a higher current maintenance rate.
  • This result demonstrates that using RO-SO 3 Li and LiBOB in combination is advantageous in reducing the cycle deterioration.
  • Comparison between Samples 7 and 6 shows that there is no significant difference in the CCA current, according to FIG. 3 .
  • Sample 7 copntaining more LiBOB exhibits a higher current maintenance rate.
  • Samples 2, 8, and 9 were obtained by replacing part of EC with PC. According to FIGS. 3 and 4 , Samples 8 and 9 containing RO-SO 3 Li and LiBOB added have higher CCA currents and current maintenance rates. This demonstrates that the addition of RO-SO 3 Li and LiBOB is advantageous in reducing the cycle deterioration even in the case where part of EC is replaced with PC.
  • the electrolyte of each of the samples contains DBC in addition to EC and GBL as nonaqueous solvents. Without DBC, the electrolyte was not smoothly introduced and the cycle life of the thus-obtained battery was short. This is because the electrolyte that does not contain DBC has poor wettability to the separator. In fact, it was confirmed that when an electrolyte containing EC and GBL and not containing DBC was added dropwise onto the separator, the contact angle was large and the wettability was poor.
  • the lithium ion secondary battery according to the embodiment is expected to exhibit good start-up properties at low temperatures for a long period of time when used as an alternative battery for a 12V lead battery and as a battery in a motor for starting an engine.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
EP21195713.9A 2020-09-17 2021-09-09 Lithium-ionen-sekundärbatterie und herstellungsverfahren dafür Active EP3972012B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020156071A JP7513983B2 (ja) 2020-09-17 2020-09-17 リチウムイオン二次電池及びその製造方法

Publications (2)

Publication Number Publication Date
EP3972012A1 true EP3972012A1 (de) 2022-03-23
EP3972012B1 EP3972012B1 (de) 2025-12-03

Family

ID=77710498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21195713.9A Active EP3972012B1 (de) 2020-09-17 2021-09-09 Lithium-ionen-sekundärbatterie und herstellungsverfahren dafür

Country Status (4)

Country Link
US (1) US12347866B2 (de)
EP (1) EP3972012B1 (de)
JP (1) JP7513983B2 (de)
CN (1) CN114204104B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021001496A1 (en) * 2019-07-03 2021-01-07 Umicore Lithium nickel manganese cobalt composite oxide as a positive electrode active material for rechargeable lithium ion batteries
WO2025164273A1 (ja) * 2024-02-02 2025-08-07 パナソニックエナジー株式会社 非水電解質二次電池用正極活物質および非水電解質二次電池
WO2025164432A1 (ja) * 2024-02-02 2025-08-07 パナソニックＩｐマネジメント株式会社 非水電解質二次電池用正極活物質および非水電解質二次電池

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000243447A (ja) 1999-02-19 2000-09-08 Sony Corp ゲル電解質及びゲル電解質電池
CN101916878A (zh) * 2010-08-27 2010-12-15 上海奥威科技开发有限公司 一种以γ-丁内酯为基础溶剂的低温有机电解液及其应用
CN103337658A (zh) * 2013-06-26 2013-10-02 东莞新能源科技有限公司 锂离子电池及其电解液
US20150372348A1 (en) * 2013-02-04 2015-12-24 Leclanché Sa Electrolyte composition for electrochemical cell
EP3086396A1 (de) * 2013-12-19 2016-10-26 UBE Industries, Ltd. Nichtwässriger elektrolyt, kondensatorvorrichtung damit und darin verwendete carbonsäureesterverbindung
EP3691016A1 (de) * 2017-10-25 2020-08-05 Daikin Industries, Ltd. Elektrolytlösung, elektrochemische vorrichtung, lithium-ionen-sekundärbatterie und modul

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001307769A (ja) * 2000-04-19 2001-11-02 Mitsui Chemicals Inc リチウム電池用電解液およびそれを用いた二次電池
CN1249839C (zh) * 2002-08-05 2006-04-05 三井化学株式会社 电解液用添加剂,使用该添加剂的非水电解液及二次电池
EP3557684B1 (de) 2005-10-20 2024-01-24 Mitsubishi Chemical Corporation Lithiumsekundärbatterien und wasserfreier elektrolyt zur verwendung darin
CN101425611B (zh) 2008-12-03 2010-09-15 北京科技大学 一种用于锂离子电池的高功能型电解液
CN102522590B (zh) * 2011-12-26 2014-09-17 华为技术有限公司 一种非水有机电解液、包含它的锂离子二次电池及其制备方法和终端通讯设备
KR20140079281A (ko) * 2012-12-18 2014-06-26 신에쓰 가가꾸 고교 가부시끼가이샤 비수전해질 2차전지용 부극과 그 제조방법 및 리튬 이온 2차전지
JP6583267B2 (ja) * 2014-05-14 2019-10-02 宇部興産株式会社 非水電解液、それを用いた蓄電デバイス、及びそれに用いるリチウム塩
WO2016011613A1 (en) 2014-07-23 2016-01-28 Basf Corporation Electrolytes for lithium transition metal phosphate batteries
EP3216071B1 (de) 2014-11-03 2022-01-05 24m Technologies, Inc. Batteriezelle umfassend eine halbfeste elektrode
JP2017021986A (ja) 2015-07-10 2017-01-26 日立マクセル株式会社 非水二次電池
CN105489857B (zh) * 2015-12-08 2018-06-29 西安瑟福能源科技有限公司 一种快速充电用锂离子电池
WO2018094101A1 (en) * 2016-11-16 2018-05-24 Sillion, Inc. Additive enhancements for ionic liquid electrolytes in li-ion batteries
CN107181003B (zh) 2017-06-23 2019-12-10 上海交通大学 一种锂离子电池用安全电解液及含该电解液的锂离子电池
JP6971740B2 (ja) * 2017-09-22 2021-11-24 三菱ケミカル株式会社 非水系電解液及びそれを用いた蓄電デバイス
JP2019087497A (ja) * 2017-11-09 2019-06-06 ダイキン工業株式会社 電解液、電気化学デバイス、リチウムイオン二次電池及びモジュール
WO2019111981A1 (ja) 2017-12-07 2019-06-13 パナソニックＩｐマネジメント株式会社 電気化学デバイス
JP2019114418A (ja) * 2017-12-22 2019-07-11 ダイキン工業株式会社 電解液、電気化学デバイス、リチウムイオン二次電池及びモジュール
CN112119531A (zh) 2018-01-10 2020-12-22 马自达汽车株式会社 锂离子二次电池电解液及锂离子二次电池
US11211639B2 (en) 2018-08-06 2021-12-28 Enovix Corporation Electrode assembly manufacture and device
CN111740158B (zh) * 2018-09-21 2022-01-11 宁德新能源科技有限公司 电解液和包含该电解液的电化学装置
CN109088097A (zh) 2018-10-25 2018-12-25 河南省法恩莱特新能源科技有限公司 一种锂离子动力电池的阻燃电解液
CN109686924A (zh) * 2018-12-17 2019-04-26 深圳先进技术研究院 预嵌钾负极、制备方法和应用、钾基双离子电池及其制备方法和用电设备
CN109671982B (zh) 2018-12-25 2021-05-11 河南电池研究院有限公司 一种匹配硅碳负极材料的锂离子电池高温高安全电解液
WO2020158547A1 (ja) 2019-01-30 2020-08-06 パナソニックＩｐマネジメント株式会社 電気化学デバイス
FR3093379B1 (fr) * 2019-03-01 2022-09-30 Accumulateurs Fixes Composition d’électrolyte pour élément électrochimique lithium-ion
WO2021166663A1 (ja) * 2020-02-20 2021-08-26 株式会社豊田自動織機 リチウムイオン二次電池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000243447A (ja) 1999-02-19 2000-09-08 Sony Corp ゲル電解質及びゲル電解質電池
CN101916878A (zh) * 2010-08-27 2010-12-15 上海奥威科技开发有限公司 一种以γ-丁内酯为基础溶剂的低温有机电解液及其应用
US20150372348A1 (en) * 2013-02-04 2015-12-24 Leclanché Sa Electrolyte composition for electrochemical cell
CN103337658A (zh) * 2013-06-26 2013-10-02 东莞新能源科技有限公司 锂离子电池及其电解液
EP3086396A1 (de) * 2013-12-19 2016-10-26 UBE Industries, Ltd. Nichtwässriger elektrolyt, kondensatorvorrichtung damit und darin verwendete carbonsäureesterverbindung
EP3691016A1 (de) * 2017-10-25 2020-08-05 Daikin Industries, Ltd. Elektrolytlösung, elektrochemische vorrichtung, lithium-ionen-sekundärbatterie und modul

Also Published As

Publication number Publication date
CN114204104B (zh) 2024-09-13
US20220085377A1 (en) 2022-03-17
CN114204104A (zh) 2022-03-18
JP2022049830A (ja) 2022-03-30
US12347866B2 (en) 2025-07-01
JP7513983B2 (ja) 2024-07-10
EP3972012B1 (de) 2025-12-03

Similar Documents

Publication Publication Date Title
EP3958362A1 (de) Sekundärbatterie, batteriemodul, batteriepack und vorrichtung mit der sekundärbatterie
JP4012174B2 (ja) 効率的な性能を有するリチウム電池
US20090305143A1 (en) Non-aqueous electrolyte secondary battery
EP3972012B1 (de) Lithium-ionen-sekundärbatterie und herstellungsverfahren dafür
KR20040028558A (ko) 비수성 전해질 이차 전지
EP3605708B1 (de) Wasserfreier elektrolyt für lithiumsekundärbatterie und denselben umfassende lithiumsekundärbatterie
US11710853B2 (en) Nonaqueous electrolyte, nonaqueous electrolyte energy storage device, and method for producing nonaqueous electrolyte energy storage device
US10903499B2 (en) Nonaqueous electrolyte secondary cell
KR20140032577A (ko) 리튬 박막을 삽입한 실리콘계 음극활물질 전극 및 이의 제조방법 및 이를 구비한 리튬이차전지
KR20200097105A (ko) 유기 전해액, 및 이를 포함하는 이차전지
EP3951989A1 (de) Nichtwässrige elektrolytlösung für eine lithiumsekundärbatterie und lithiumsekundärbatterie damit
EP3771015A1 (de) Lithiumsekundärbatterie
EP3793014A1 (de) Lithiumionen-sekundärbatterie und verfahren zur herstellung derselben
JPWO2012029388A1 (ja) 二次電池
EP4489164A1 (de) Zylindrische lithiumsekundärbatterie
EP3905386A1 (de) Sekundärbatterie mit wasserfreiem elektrolyt und verfahren zu ihrer herstellung
US20140255736A1 (en) Non-aqueous electrolyte secondary battery
US11450887B2 (en) Electrolyte for lithium secondary battery and lithium secondary battery containing same
JP6585365B2 (ja) 非水電解質二次電池
JP2011040333A (ja) 非水電解液二次電池
KR20080087338A (ko) 전지성능의 열화현상이 개선된 리튬 이차전지
US20230238577A1 (en) Dual-additive electrolyte solutions for overcharge response mitigation
US20110143215A1 (en) Nonaqueous electrolyte secondary battery
KR20220048804A (ko) 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지
KR20220061585A (ko) 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220916

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20250825

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: F10

Free format text: ST27 STATUS EVENT CODE: U-0-0-F10-F00 (AS PROVIDED BY THE NATIONAL OFFICE)

Effective date: 20251203

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602021043487

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D